Windsor weather in May

In May, Windsor sees average daytime highs of 20°C and overnight lows near 11°C, with 90 mm of rain across 12.8 wet days and about 14.4 hours of daylight. It is the 5th-warmest and 2nd-wettest month of the year here.

Highs climb over the month, from about 17°C in the first days to 22°C by the end. The sky is clear or mostly clear about 25% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 48 min at the start of May to 14 h 48 min by month's end. Set against the rest of the year, May is Windsor's 6th-clearest and 8th-windiest month. For the whole year in context, see Windsor's year-round climate.

Daytime high
20°
5th warmest
Overnight low
11°
8th coldest
Rainfall
90 mm
12.8 wet days
Daylight
14 h 24 min
5:16 AM – 7:40 PM
Cloud cover
64%
6th clearest
Wind
15 km/h
8th windiest
Solar energy
5.91 kWh/m²
Travel score
5.7
out of 10

Windsor is city in Essex County, Ontario, Canada.

Air quality
Good
PM2.5 8.5 µg/m³ · 2019
Density
1,570/km²
people per km²
Founded
1749

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 17°C in the first days to 22°C by the end.

A typical May day in Windsor reaches about 20°C in the afternoon and slips back to 11°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 26°C. Set against its neighbours, May runs about 7°C warmer than April and about 6°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1168
2179
3179
4179
5179
6189
71810
81810
91810
101810
111910
121910
131911
141911
151911
162011
172011
182012
192012
202012
212112
222112
232113
242113
252113
262213
272214
282214
292214
302314
312314

How May really feels in Windsor

Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Windsor weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-0° / -7°6410.25.99.30.0
Feb / -6°548.35.410.30.0
Mar / -2°659.63.811.60.6
Apr13° / 9112113.13.4
May20° / 11°9012.8014.45.7
Jun25° / 17°8610.90156.6
Jul27° / 19°7810.7014.86.4
Aug26° / 19°769.6013.76.8
Sep22° / 14°678.3012.37.0
Oct15° / 698.9010.84.8
Nov / 6991.59.61.5
Dec / -3°629.14.190.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23862
33862
43862
53961
63961
73961
84060
93961
104060
114060
124060
134060
144060
154060
163961
173961
183961
193961
203961
213961
224060
234159
244159
254258
264258
274258
284258
294258
304357
314456

Chance of precipitation in May

Any precipitation

Windsor gets around 90 mm of rain over 12.8 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 41% and peaks near 43% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
140
240
340
440
541
641
742
842
942
1043
1143
1243
1343
1443
1543
1643
1742
1842
1941
2041
2140
2240
2340
2440
2539
2639
2739
2839
2939
3039
3139

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the dry band about 73% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1908200
2908200
3879310
4879310
58610310
68510410
78510410
88211520
98211520
108211520
118111620
127912630
137812730
147713730
157713730
167513840
177414840
187314940
197115950
2070151050
2167161061
2266161161
2364171171
2463171271
2560181381
2660181381
2758191481
2856191591
2956191591
3054201691
31532016101

Wind in May

Winds average 15 km/h in May.

Across May, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 48 min at the start of May to 14 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over May. Sunrise moves from 5:35 AM to 5:05 AM, and sunset from 7:24 PM to 7:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.85:357:24
213.95:337:25
313.95:327:26
413.95:317:27
514.05:297:28
614.05:287:29
714.15:277:30
814.15:267:32
914.15:247:33
1014.25:237:34
1114.25:227:35
1214.35:217:36
1314.35:207:37
1414.35:197:38
1514.45:177:39
1614.45:167:40
1714.45:157:41
1814.55:147:42
1914.55:147:43
2014.55:137:44
2114.65:127:45
2214.65:117:46
2314.65:107:47
2414.65:097:48
2514.75:087:49
2614.75:087:50
2714.75:077:51
2814.85:067:52
2914.85:067:53
3014.85:057:54
3114.85:057:54

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.91 kWh/m².

For context, solar energy here swings from a low near 1.48 kWh/m² to a high of 6.48 kWh/m² in June across the year — May's 5.91 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.9Bright
175.9Bright
185.9Bright
196.0Bright
206.0Intense
216.0Intense
226.0Intense
236.1Intense
246.1Intense
256.1Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
316.3Intense
Planning a trip in May

Is May a good time to visit Windsor?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.7
Sightseeing
5th-best month of the year
2.8
Beach & pool
5th-best month of the year

May is a reasonable time to visit Windsor for sightseeing.

What to pack for Windsor in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Windsor sees daytime highs around 20°C and nights near 11°C. Worth packing: rain gear and sun protection. About 13 days see rain.

rain gearsun protection

Sea temperature near Windsor in May

The nearest coast averages about 11°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 14 km away) is warmest in August at about 23°C and coldest in February near 0°C.

It's comfortable for a long swim from Jul 2 to Sep 15 — about 2.5 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan1Bracing
Feb0Bracing
Mar1Bracing
Apr5Bracing
May11Bracing
Jun18Cool
Jul22Refreshing
Aug23Refreshing
Sep20Refreshing
Oct14Bracing
Nov8Bracing
Dec4Bracing

UV index in Windsor in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Windsor peaks around June 20 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 20UV 9Dec 20UV 1
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr6High
May7High
Jun9Very high
Jul8Very high
Aug7High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Windsor?

Windsor sits at 42.3°N, 83.0°W, 190 m above sea level, in Canada. The nearest listed city is Detroit, 4.0 km away.

Topography around Windsor

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Windsor.

Within 3 km, the terrain around Windsor has only modest variations in elevation — a maximum elevation change of 41 m around an average of 187 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 98 m; within 80 km, significant variations in elevation — a maximum elevation change of 279 m.

The land around Windsor is covered by artificial surfaces (64%) and trees (21%) within 3 km, artificial surfaces (36%) and trees (20%) within 16 km, and water (29%), trees (26%) and cropland (26%) within 80 km.

3 km
41 m
16 km
98 m
80 km
279 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Detroit 4.0 km · LaSalle 7.0 km · Hamtramck 11 km · Tecumseh 11 km · Dearborn 13 km · Lincoln Park 14 km · Wyandotte 15 km · Allen Park 17 km

Canada travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 83% of US
price level, 2025
GDP per capita
$55,698
2025
Happiness
6.7 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
2
per 100k, 2023
Road deaths
5.3
per 100k/yr, 2019
Income group
High
World Bank
Religion
Christian 53%none 35%Muslim 5%Hindu 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Windsor (42.3001°, -83.0165°, elevation 190 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).